This year’s World Water Day is taking on a broader theme than years past: sustainable development. The theme makes sense as two major international processes – the drafting of the Sustainable Development Goals to replace the Millennium Development Goals, and the most anticipated UN Climate Summit in years – are taking place in 2015. Decisions made over the next nine months will play a huge role in relationships between nations and global development priorities going forward.

Hans Rosling has always been an innovator when it comes to bringing big ideas to big audiences. The Norwegian doctor, statistician, and co-founder of the Gapminder Foundation has become known – to the kind of people who watch TED Talks anyway – for lively presentations aimed at demystifying common ideas about global development and demography. On Gapminder.org, he literally stands chest high in water appealing for your donation to help him “cross the river of myths.”